1) There is a special event for saving components to a file, OnSaveComponentToFile
Since the last update, it includes two hidden parameters: Sender.Style.RVData and Sender.Style.ItemNo.
So you can get the item text as TCustomRVData(Sender.Style.RVData).GetItemText(Sender.Style.ItemNo)

2) If you use OnSaveItemToFile for saving controls, the code in it must be like this: